Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaefebcb8f6a223…

MALICIOUS

PDF

90.5 KB Created: 2021-09-10 20:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 6e90d9deb8e856da47da64d705fc9960 SHA-1: 4cc2cd00e29d9e0c1f72063993196087d3c15356 SHA-256: 7aaefebcb8f6a22304b9ca0e429cf20426d2ea776fa3885fa31a04923ecf4ad4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/32727387613.pdf In PDF document text
    • http://saddabro.com/userfiles/file/67732528458.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f5603fcb7---48409865488.pdfIn PDF document text
    • https://vitanov.rs/files/golijalararag.pdfIn PDF document text
    • https://taperagi.com/contents/files/87557598700.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/xezaxetidun.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/jilulidagilaxemupivaxovu.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-07/210907001743079539pbbvrrkpowns.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/8583753179.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/34881654878.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/tutusogidejusesojog.pdfIn PDF document text
    • https://mar3ol.com/Files/files/53807687164.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16131bd72c66c4---ludine.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/bumijama.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/49135579536.pdfIn PDF document text
    • https://taperagi.com/contents/files/53380258561.pdfIn PDF document text
    • https://posetili.ru/userfiles/file/napazobomomedoden.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/didodij.pdfIn PDF document text
    • http://hainfelderteich.at/34740746557.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/29654550542.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/jarepakifupuwifarexeset.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/39895568510.pdfIn PDF document text
    • https://actorconseil.com/files/file/foruvanirilexar.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/46360056737.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/vojegejujokerusejuwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=wine+android+2020PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 19168 bytes
SHA-256: 2d2d49c646264480a3fb93c9ff56ec79709f9aba398b1dbbea10d98a7a90ec8b
font_02_sfnt_off00014572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14572 10164 bytes
SHA-256: 678f54473d3a38fac867831a721523a157fd719c8c8352696d3ee9f5b6008887

Open this report in the interactive analyzer, or submit your own file for analysis.